| Navy | The Royal Navy |
| Type | Submarine |
| Class | S |
| Pennant | P 225 |
| Built by | Cammell Laird Shipyard (Birkenhead, U.K.) |
| Ordered | |
| Laid down | 14 Jul 1941 |
| Launched | 12 Oct 1942 |
| Commissioned | 30 Dec 1942 |
| Lost | Nov 1943 |
| Loss position | |
| History | HMS Simoom (Lt. Geoffrey Deryck Nicholson Milner, DSC, RN) sailed from Port Said, Egypt on 2 November 1943 for the Aegean. She was to arrive off the Dardanelles on 6th. Possibly lost on 4 November of Donoussa island, Cyclades, Greece in a newly laid German minefield. Commanding Officers: Lt. Geoffrey Deryck Nicholson Milner, DSC, RN |
Commands listed for HMS Simoom (P 225)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Lt. Christopher Henry Rankin, RN | 24 Oct 1942 | 13 Apr 1943 |
| 2 | Lt. Geoffrey Deryck Nicholson Milner, DSC, RN | 13 Apr 1943 | Nov 1943 |
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Noteable events involving Simoom include:
8 Aug 1943
While on patrol east of Bastia, HMS Simoom (Lt. G.D.N. Milner, DSC, RN) fires three torpedoes at what is identified as 'a merchant'. All torpedoes missed their target.
9 Aug 1943
HMS Simoom (Lt. G.D.N. Milner, DSC, RN) attacked the Italian cruiser Giuseppe Garibaldi 5 nautical miles south-west of La Spezia in position 44º04'N, 09º23'E. The torpedoes missed the cruiser but hit and sank the destroyer Vincenzo Gioberti (1685 tons) instead. (see map)